In NR, there are roughly two large frequency ranges specified in 3GPP. One is below 6 GHz (also referred to as sub 6 GHz or FR1). The other is above 6 GHz (also referred to as millimeter wave or FR2. Depending on the frequency ranges, the maximum bandwidth and subcarrier spacing varies. In FR1, the maximum bandwidth is 100 MHz and in the FR2 range the maximum bandwidth is 400 MHz. Some subcarrier spacing (e.g., 15 kHz and 30 kHz) can be used only in FR1 and some subcarrier spacing (e.g., 120 kHz and 240 kHz) can be used in FR2 only, and some subcarrier spacing (e.g., 60 kHz) can be used both in the FR1 and FR2 range.
As mentioned above, two types of frequency ranges are defined in 3GPP. Sub 6 GHz range is called FR1, and millimeter wave range is called FR2. The exact frequency range for FR1 (sub 6 GHz) and FR2 (millimeter wave) may be defined as in Table 1. Table 2 provides examples of NR operating bands in FR1. Table 3 provides examples of NR operating bands in FR2. Table 4 provides applicable synchronization signal (SS) raster entries per operating band (FR1). Table 5 provides applicable SS raster entries per operating band (FR2).